LIVIVO - Search results -

Search results

Result 1 - 10 of total 14

Search options

Article ; Online: Growth and Characterization of Sputtered InAlN Nanorods on Sapphire Substrates for Acetone Gas Sensing

Ray-Hua Horng / Po-Hsiang Cho / Jui-Che Chang / Anoop Kumar Singh / Sheng-Yuan Jhang / Po-Liang Liu / Dong-Sing Wuu / Samiran Bairagi / Cheng-Hsu Chen / Kenneth Järrendahl / Ching-Lien Hsiao

Nanomaterials, Vol 14, Iss 1, p

2023 Volume 26

Abstract: The demand for highly sensitive and selective gas sensors has been steadily increasing, driven by applications in various fields such as environmental monitoring, healthcare, and industrial safety. In this context, ternary alloy indium aluminum nitride ( ... ...

Abstract	The demand for highly sensitive and selective gas sensors has been steadily increasing, driven by applications in various fields such as environmental monitoring, healthcare, and industrial safety. In this context, ternary alloy indium aluminum nitride (InAlN) semiconductors have emerged as a promising material for gas sensing due to their unique properties and tunable material characteristics. This work focuses on the fabrication and characterization of InAlN nanorods grown on sapphire substrates using an ultra-high vacuum magnetron sputter epitaxy with precise control over indium composition and explores their potential for acetone-gas-sensing applications. Various characterization techniques, including XRD, SEM, and TEM, demonstrate the structural and morphological insights of InAlN nanorods, making them suitable for gas-sensing applications. To evaluate the gas-sensing performance of the InAlN nanorods, acetone was chosen as a target analyte due to its relevance in medical diagnostics and industrial processes. The results reveal that the InAlN nanorods exhibit a remarkable sensor response of 2.33% at 600 ppm acetone gas concentration at an operating temperature of 350 °C, with a rapid response time of 18 s. Their high sensor response and rapid response make InAlN a viable candidate for use in medical diagnostics, industrial safety, and environmental monitoring.
Keywords	acetone gas sensor ; InAlN ; magnetron sputtering ; nanorods ; sapphire ; DFT ; Chemistry ; QD1-999
Subject code	621
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

Sunil Kumar / Vijay Kumar / Anoop Kumar Singh / Sani Kumar Singh

Tribology Online, Vol 13, Iss 5, Pp 254-

2018 Volume 261

Abstract: This literature study is based on the research work conducted in the field of erosion behavior of steel alloys. The focus is on the surface modification of the steel alloys by heat treatment, surface hardening and surface coating methods. Laser cladding ... ...

Abstract	This literature study is based on the research work conducted in the field of erosion behavior of steel alloys. The focus is on the surface modification of the steel alloys by heat treatment, surface hardening and surface coating methods. Laser cladding and laser hardening processes are also explained. The influence of tribological parameters on the erosion is explained. Steel alloys are chosen because of a wide number of applications due to their excellent properties. Efforts have been made to understand the cause and the remedial action towards the improvements in wear performance. Suitable surface treatment method on the steel alloys may definitely do this work but there should be a need of proper control over the process parameters. The environmental conditions of the laboratory are differing from the real working environment. Hence, the results which are satisfactory at the laboratory are not doing well in real place of application.
Keywords	erosion ; heat treatment ; surface hardening ; thermal spray coating ; Physics ; QC1-999 ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Mechanical engineering and machinery ; TJ1-1570 ; Chemistry ; QD1-999
Subject code	669
Language	English
Publishing date	2018-11-01T00:00:00Z
Publisher	Japanese Society of Tribologists
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: The Effect of Annealing Ambience on the Material and Photodetector Characteristics of Sputtered ZnGa 2 O 4 Films

Anoop Kumar Singh / Shiau-Yuan Huang / Po-Wei Chen / Jung-Lung Chiang / Dong-Sing Wuu

Nanomaterials, Vol 11, Iss 2316, p

2021 Volume 2316

Abstract: Spinel ZnGa 2 O 4 films were grown on c-plane sapphire substrates at the substrate temperature of 400 °C by radio-frequency magnetron sputtering. Post thermal annealing was employed at the annealing temperature of 700 °C in order to enhance their crystal ...

Abstract	Spinel ZnGa 2 O 4 films were grown on c-plane sapphire substrates at the substrate temperature of 400 °C by radio-frequency magnetron sputtering. Post thermal annealing was employed at the annealing temperature of 700 °C in order to enhance their crystal quality. The effect of thermal annealing on the microstructural and optoelectronic properties of ZnGa 2 O 4 films was systematically investigated in various ambiences, such as air, nitrogen, and oxygen. The X-ray diffraction patterns of annealed ZnGa 2 O 4 films showed the crystalline structure to have (111) crystallographic planes. Transmission electron micrographs verified that ZnGa 2 O 4 film annealed under air ambience possesses a quasi-single-crystalline structure. This ZnGa 2 O 4 film annealed under air ambience exhibited a smooth surface, an excellent average transmittance above 82% in the visible region, and a wide bandgap of 5.05 eV. The oxygen vacancies under different annealing ambiences were revealed a substantial impact on the material and photodetector characteristics by X-ray photoelectron spectrum investigations. ZnGa 2 O 4 film exhibits optimal performance as a metal-semiconductor-metal photodetector when annealed under air ambience. Under these conditions, ZnGa 2 O 4 film exhibits a higher photo/dark current ratio of ~10 4 order, as well as a high responsivity of 2.53 A/W at the bias of 5 V under an incident optical light of 240 nm. These results demonstrate that quasi-single-crystalline ZnGa 2 O 4 films have significant potential in deep-ultraviolet applications.
Keywords	ZnGa 2 O 4 ; annealing ambience ; wide bandgap ; metal-semiconductor-metal photodetector ; responsivity ; Chemistry ; QD1-999
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Zinc Gallium Oxide—A Review from Synthesis to Applications

Mu-I Chen / Anoop Kumar Singh / Jung-Lung Chiang / Ray-Hua Horng / Dong-Sing Wuu

Nanomaterials, Vol 10, Iss 2208, p

2020 Volume 2208

Abstract: Spinel ZnGa 2 O 4 has received significant attention from researchers due to its wide bandgap and high chemical and thermal stability; hence, paving the way for it to have potential in various applications. This review focuses on its physical, optical, ... ...

Abstract	Spinel ZnGa 2 O 4 has received significant attention from researchers due to its wide bandgap and high chemical and thermal stability; hence, paving the way for it to have potential in various applications. This review focuses on its physical, optical, mechanical and electrical properties, contributing to the better understanding of this material. The recent trends for growth techniques and processing in the research and development of ZnGa 2 O 4 from bulk crystal growth to thin films are discussed in detail for device performance. This material has excellent properties and is investigated widely in deep-ultraviolet photodetectors, gas sensors and phosphors. In this article, effects of substrate temperature, annealing temperature, oxygen partial pressure and zinc/gallium ratio are discussed for device processing and fabrication. In addition, research progress and future outlooks are also identified.
Keywords	ZnGa 2 O 4 ; spinel structure ; wide-bandgap ; photodetector ; phosphor ; gas sensor ; Chemistry ; QD1-999
Subject code	620
Language	English
Publishing date	2020-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Effect of altered ambient temperature through shelter modifications on physiological indicators of Malpura lambs reared in semi-arid region during winter

De, Kalyan / Davendra Kumar / Anoop Kumar Singh / Artabandhu Sahoo / Syed Mohammed Khursheed Naqvi

Journal of thermal biology. 2018 Feb., v. 72

2018

Abstract: Microclimatic factors are of crucial aspect for the welfare of animals. Therefore, a study was conducted to assess the effect of altered ambient temperature through shelter modifications on physiological indicators of Malpura lambs reared in the semi- ... ...

Abstract	Microclimatic factors are of crucial aspect for the welfare of animals. Therefore, a study was conducted to assess the effect of altered ambient temperature through shelter modifications on physiological indicators of Malpura lambs reared in the semi-arid region during winter. Twenty-one Malpura lambs of 3–5 week age and average body weight 9.97 ± 0.51 kg were used in the present study. The lambs were divided into three groups (eg. G1, G2, and G3) and were kept in the different microenvironment by manipulation of shelter design. The G1 lambs were maintained at lower minimum temperature (8.59 ± 0.71 °C) in asbestos roofed shed, while G2 lambs were maintained at higher minimum temperature (14.59 ± 0.54 °C) in local handmade bamboo dome structure, and G3 lambs were kept at a medium minimum temperature (11.84 ± 0.64 °C) in thermocol insulated roofed shed from evening 18:30 h to morning 07:00 h. The study was carried out for one month between January and February. The parameters studied were physiological response (respiration rate, pulse rate, rectal temperature), skin temperature, blood metabolites and endocrine profile. The data were analyzed by general linear models. Higher average daily weight gain was recorded in the lambs kept in higher minimum temperature groups (20.54% higher in G2 and 24.68% higher in G3) as compared to G1 lambs. Microenvironment manipulation had no significant (P > 0.05) effect on most of the physiological response and skin temperature except morning respiration rate within low-temperature range. The present study reveals that Hb, PCV, T3, and cortisol level were significantly (P < 0.05) influenced by microenvironment manipulation. The results of the study indicated that altered ambient temperature through altered shelter design of housing for raising of lambs in the semi-arid tropical region may support animal welfare during chilling nights of the winter.
Keywords	ambient temperature ; animal welfare ; asbestos ; bamboos ; blood ; body weight ; cell respiration ; cold treatment ; cortisol ; data analysis ; heart rate ; lambs ; linear models ; metabolites ; microclimate ; physiological response ; rearing ; semiarid zones ; skin temperature ; tropics ; weight gain ; winter
Language	English
Dates of publication	2018-02
Size	p. 161-167.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1498364-3
ISSN	1879-0992 ; 0306-4565
ISSN (online)	1879-0992
ISSN	0306-4565
DOI	10.1016/j.jtherbio.2018.02.003
Database	NAL-Catalogue (AGRICOLA)

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Invasive cribriform carcinoma of male breast

Archika Gupta / Harendra Kumar / Manish Budhiraja / Anoop Kumar Singh

Oncology, Gastroenterology and Hepatology Reports, Vol 3, Iss 2, Pp 50-

A rare histopathologic entity

2014 Volume 51

Abstract: Male breast carcinoma is a rare entity with an incidence of less than 1% of all breast cancer cases, and more than 90% of male breast cancers are invasive. All types of breast cancer seen in females are present in males, with the most common histological ...

Abstract	Male breast carcinoma is a rare entity with an incidence of less than 1% of all breast cancer cases, and more than 90% of male breast cancers are invasive. All types of breast cancer seen in females are present in males, with the most common histological variant being infiltrating ductal carcinomas. However, invasive cribriform carcinoma, a rare type of invasive breast carcinoma, is extremely rarely seen in males. Here, we report a very rare case of invasive breast carcinoma in a male patient, with only three cases reported earlier
Keywords	Breast cancer ; cribriform pattern ; invasive ; male breast cancer ; Medicine (General) ; R5-920 ; Medicine ; R ; Neoplasms. Tumors. Oncology. Including cancer and carcinogens ; RC254-282
Language	English
Publishing date	2014-06-01T00:00:00Z
Publisher	EManuscript Services
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Monsoon variability and major climatic events between 25 and 0.05 ka BP using sedimentary parameters in the Gangotri Glacier region, Garhwal Himalaya, India

Singh, Dhruv Sen / Chetan Anand Dubey / Dhirendra Kumar / Balkrishan Vishawakarma / Anoop Kumar Singh / Akanaksha Tripathi / Pawan Kumar Gautam / Rameshwar Bali / Kamal Kishore Agarwal / Rajveer Sharma

Quaternary international. 2019 Feb. 25, v. 507

2019

Abstract: Gangotri Glacier has attracted international attention for its rapid rate of retreat. It is one of the best studied Himalayan glaciers, however there are no unanimous views about the history of climate change for the Gangotri Glacier. We prepared the ... ...

Abstract	Gangotri Glacier has attracted international attention for its rapid rate of retreat. It is one of the best studied Himalayan glaciers, however there are no unanimous views about the history of climate change for the Gangotri Glacier. We prepared the lithologs/textural logs by making two trenches in the kame terraces and analysed it in detail for sediment grain parameters and 14C AMS dates to infer the depositional sedimentary environments, monsoon variability and major climatic events in the Gangotri Glacier region.The sedimentary parameters and geomorphic analysis revealed that the sediments of the kame terraces are consolidated to semi-consolidated, stratified, very coarse to fine grained layers of sand, silt and clay with few gravels and sedimentary structures. The sediment size indicating energy of the depositional environment varies from medium to fine sand (1.02–2.26 Φ). The standard deviation is poorly sorted (0.89–1.46 Φ) which describes that the energy of the depositional environment is continuously fluctuating. The positive skewness (0.32–0.98 Φ) indicates the excess of finer sediments and dominance of low energy whereas, very leptokurtic kurtosis (2.28–4.47 Φ) describes the fluctuating energy conditions.The present study explains the glacial stages and weak Indian Summer Monsoon (ISM) around 19.5, 14.5, 13.1, 10.1, 8.6, 7.5, 2.2, 0.54, 0.08 ka BP and warm and intense ISM during 23.9, 22.7, 19.4, 1.15, 0.05 ka BP. The higher percentage of clay in both the trenches around 0.65–0.2 ka BP (1300–1750 AD) and higher percentage of silt and low clay content around 1.15–0.55 ka BP (800–1400 AD) validates the Little Ice Age (LIA) and Medieval Warm Period (MWP) respectively.
Keywords	carbon ; clay ; clay fraction ; climate change ; energy ; glaciers ; monsoon season ; sand ; silt ; standard deviation ; terraces ; Himalayan region ; India
Language	English
Dates of publication	2019-0225
Size	p. 148-155.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	1040-6182
DOI	10.1016/j.quaint.2019.02.018
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: 1. Transdermal drug delivery systems for antihypertensive drugs - A review

T. Sivakumar / R. Panner Selvam / Anoop Kumar Singh

International Journal of Pharmaceutical and Biomedical Research (IJPBR), Vol 01, Iss 01, Pp 1-

2010 Volume 8

Abstract: Hypertension is one of the largest deaths causing disease for the mankind. Since it is a chronic disease it necessitates long term treatment. The disadvantages of antihypertensive drugs such as more frequent of administration, extensive first pass ... ...

Abstract	Hypertension is one of the largest deaths causing disease for the mankind. Since it is a chronic disease it necessitates long term treatment. The disadvantages of antihypertensive drugs such as more frequent of administration, extensive first pass metabolism and variable bioavailability, make it is an ideal candidate for transdermal drug delivery systems. This article is dedicated to the review of antihypertensive transdermal patches in the perspective of enhancing the bioavailibity as well as in improving the patient compliance. The various antihypertensive drugs considered in the review includes timolol maleate, nicardipine hydrochloride, captopril, atenolol, metoprolol tartrate, clonidine, indapamide, labetolol, pinacidil, verapamil hydrochloride, nitrendipine, nifedipine, nicorandil, propranolol hydrochloride, diltiazem hydrochloride, amlodipine besilate, carvedilol and lisinopril. Clonidine was the first antihypertensive drug developed in the transdermal form. Currently a number of antihypertensive transdermal patches are introduced in to the pharmaceutical market. Most of the reported methods in the literature employed solvent evaporation method or solvent casting method for the preparation of transdermal patches. Depending on the release required over a period of time, the concentrations of polymer, plasticizer and penetrant were varied.
Keywords	Transdermal drug delivery systems ; Transdermal patches ; Antihypertensive drugs ; Pharmacy and materia medica ; RS1-441 ; Medicine ; R ; DOAJ:Pharmacy and materia medica ; DOAJ:Medicine (General) ; DOAJ:Health Sciences ; Therapeutics. Pharmacology ; RM1-950 ; DOAJ:Therapeutics
Subject code	660
Language	English
Publishing date	2010-02-01T00:00:00Z
Publisher	PharmSciDirect Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: 2. Isolation, characterisation and formulation properties of a new plant gum obtained from mangifera indica

T. Sivakumar / Anoop Kumar Singh / R. Panner Selvam

International Journal of Pharmaceutical and Biomedical Research (IJPBR), Vol 01, Iss 02, Pp 35-

2010 Volume 41

Abstract: This study elucidated the physical, thermal, sorption and functional properties of a gum obtained from the stem of mangifera indica were characterized viz. elemental analysis, Fourier transmittance infra red, particle size analysis, thermo gravimetric ... ...

Abstract	This study elucidated the physical, thermal, sorption and functional properties of a gum obtained from the stem of mangifera indica were characterized viz. elemental analysis, Fourier transmittance infra red, particle size analysis, thermo gravimetric analysis, differential scanning colorimetry, scanning electron microscopy and X-ray powder diffraction. Mangifera indica gum had a glass transition temperature (Tg) and melting peak of 90 and 318.795°C, respectively. This material showed a 14.59 % loss in weight at 200oC. The sample had peaks at approximately 21o, 29o, and 39o 2θ degrees of 2-theta (θ) in the X-ray powder diffraction pattern. Elemental analysis showed that gum of mangifera indica contains 35.62, 6.12, 56.57 and 1.67% of carbon, hydrogen, oxygen and nitrogen, respectively. The results obtained in this study establish the fundamental characteristics of mangifera indica gum. The in vitro drug release was more than 90 % at 30 min. Tablets with 5% w/w binder concentration showed optimum results than standard binder, thus conclusion was drawn that mango gum was found to be useful for the preparation of uncoated tablet dosage form.
Keywords	Mangifera indica ; mango gum ; tablet binder ; excipients ; Pharmacy and materia medica ; RS1-441 ; Medicine ; R ; DOAJ:Pharmacy and materia medica ; DOAJ:Medicine (General) ; DOAJ:Health Sciences ; Therapeutics. Pharmacology ; RM1-950 ; DOAJ:Therapeutics
Language	English
Publishing date	2010-04-01T00:00:00Z
Publisher	PharmSciDirect Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Stalagmite based high resolution precipitation variability for past four centuries in the Indian Central Himalaya: Chulerasim cave re-visited and data re-interpretation

Kotlia, Bahadur Singh / Anoop Kumar Singh / Arun Kumar Sharma / Jian-Xin Zhao / Ming Tan / Waseem Raza / Wuhui Duan

Quaternary international. 2017 July 15, v. 444

2017

Abstract: Although the variations in δ18O and δ13C and the U/Th dating in the speleothems are considered as key proxies, improved dating with better quality resolution as well as composition of stalagmites and growth rate along with the cave monitoring are equally ...

Abstract	Although the variations in δ18O and δ13C and the U/Th dating in the speleothems are considered as key proxies, improved dating with better quality resolution as well as composition of stalagmites and growth rate along with the cave monitoring are equally important for understanding the high resolution precipitation variability in the past. With a total of six dates on a 11.5 cm long stalagmite, we re-interpret the decadal to century scale climatic changes with multi-year droughts from the Indian Central Himalaya between ca. 1622 and 1950 AD. The sample is composed of aragonite (both compact sub-layers and porous sub-layers). Although, the age model of this young speleothem may be within age uncertainty owing to the high 230Th/232Th isotope ratios, yet the distinction of this study lies in recording various historical drought events which are otherwise never reported from the Himalayan foothills. Additionally, the sample consists of reasonable amount of U (>2 ppm), thus the age correction requirement may be minimum. The higher growth rate and comparatively lower values of δ18O and δ13C are observed during the Little Ice Age (LIA) until ca. 1820 AD, indicating its being wet in the Himalayan foothills in contrast to the Peninsular India and other regions which are solely influenced by the Indian Summer Monsoon (ISM). This is mainly because the monsoon trough moves from the plains to the Himalayan foothills during break-monsoon conditions and provides more orographic precipitation in form of the Westerlies in the south facing Himalayan slopes. The post-LIA period from ca. 1820 AD onwards is interpreted as comparatively drier than the LIA.
Keywords	aragonite ; carbon ; climate change ; drought ; hills ; isotopes ; models ; monitoring ; monsoon season ; oxygen ; uncertainty ; Himalayan region ; India
Language	English
Dates of publication	2017-0715
Size	p. 35-43.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	1040-6182
DOI	10.1016/j.quaint.2016.04.007
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED